Residents and officials of the city of Long Beach know all about the importance of the ports of L.A. and Long Beach and know how creating shorter truck routes would help Southern California's economy and environment. So it's not ignorance that caused Long Beach Mayor Bob Foster to lead calls Wednesday for the L.A. council to delay approval of an environmental-impact report and 50-year lease on a 153-acre site near the Terminal Island Freeway. It's genuine worry about the health risks of increased train and truck traffic on the nearby neighborhood and schools.